You are right, potlatch. Many breeds will take bullets to protect their family, home and territory.
Mostly the “herding breed”, which includes Belgian Shepherds (Malinois particularly), German Shepherds, any mixed breed dog that is considered a farm dog.
But, forget the labs and goldens. They make great family dogs, are not known to take a bullet, as a general rule. I am sure there are some exceptions, so don’t flame me!
Certain breeds are just more aggressive and protective of ‘their territory’ and I find that my Yorkie is like that. He'll run out in the yard looking around and scruffing his feet to see if anyone has invaded his domain, lol.
Of course, all he could do is nip at your ankles, heh!
Akitas are very protective, too.